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General Tools

Model # IRT659K

Internet # 204326206

Industrial IR Thermometer with K Probe and Adjustable Emissivity

This item has been discontinued.
The Home Depot no longer carries this specific product.

$64.45 /each

  • Can set high and low temperature alarms
  • Holds measurements and stores readings
  • Includes a 9-volt battery


Model # IRT659K

Internet # 204326206

The General Tools Industrial IR Thermometer with K Probe and Adjustable Emissivity is ideal for isolating overheated electrical components and hot spots, troubleshooting HVAC/R and automotive systems, and performance-testing of motors and boilers. This tool automatically holds measurements and conveniently stores the last 10 readings for recall. It is powered by one 9-volt battery (included).

California residents: see  Proposition 65 information

  • 12:1 D/S ratio, K probe and adjustable emissivity
  • IR range: -58 to 1202 degrees F (-50 to 650 degrees C)
  • K (TC) range: -146 to 2498 degrees F
  • Automatically stores last 10 readings for recall
  • Automatically holds measurements and displays minimum/maximum/average/different values
  • Settable high and low temperature alarms
  • Adjustable emissivity from 0.1 to 1.0 (in 0.01 steps)
  • Auto power off
  • Includes pouch, battery, manual and K probe
  • IR accuracy = plus or minus 2% of reading above 32 degrees F; plus or minus 3% of reading below 32 degrees F
  • C/F and laser pointer on/off switches
  • Home Depot Protection Plan:

    Home Depot Protection Plan

Info & Guides

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Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Automatic Emissivity Adjustment 
Batteries Included 
Battery Charger Included 
Battery Power Type 
Battery Size 
Case Included 
Control Type 
Data Log/Record 
Data hold 
Display Type 
Distance to Spot Ratio 
Impact Resistant 
Low Battery Indicator 
Max Accurate Temp Measurement (F) 
Min Accurate Temp Measurement (F) 
Number of Batteries Required 
On/Off Switch for Laser Sight 
Product Weight (lb.) 
0.43 lb 
Reference Scale Included 
Test Meter Type 
Infrared Thermometer 
Tools Product Type 
Test Meter 
Water Resistant 
Warranty / Certifications
Manufacturer Warranty 
1 Year 


Rated 4.0 out of 5 by 8 reviewers.
Rated 4.0 out of 5.0 by Does what it should This thermometer functions as expected. The thermometer and the K probe are both very responsive. It also comes with a very nice case which is large enough the fit the K probe but not much else. Not having a proper fitting case may prove to be a problem over time because of the environments I'll be using this in so I'll have to buy a case to fit and use this one for something else. August 4, 2015
Rated 1.0 out of 5.0 by Terrible The temperatures are all wrong when using it without the probe. I am seeking a full refund. July 24, 2015
Rated 5.0 out of 5.0 by Easy to Use IR Thermometer I recently upgraded my temperature measurement instruments with a new General Tools Infrared Thermometer with K-Type Thermocouple (IRT659K). The instructions are concise and easy to understand the different modes and functions. A fabric case is included to store the thermometer and thermocouple. The backlit LCD screen is great for use in dark conditions. The IR Thermometer is ideal for monitoring electrical equipment for possible overheating. I use it to monitor the temperature in the attic and use the thermocouple for checking the airflow temperature in the air conditioner. The accuracy is +/- 3 degree F or 2%, whichever is greater. It is certainly not an appropriate tool if exact temperature measurements are required. However, it’s a very useful tool for identifying hot spots or obtaining a surface temperature. Highly recommended! October 1, 2014
Rated 5.0 out of 5.0 by IR Thermometer is useful for professional and domestics jobs I always wanted to get an IR thermometer for domestic purposes. I went to my local Home Depot many times over the years to research these and found that they are packaged mostly for HVAC professionals, mechanics, and service techs. However, there shouldn't be any reasons that folks like you and I can't use these same tools for domestic uses around the house. For instance, I decided to use this see how hot my shower water gets. Doing so, I was able to adjust my water heater to the appropriate temp. I also used it to see if my BBQ was getting proper heat distribution. I did an example in my attached photos. I tested the cold temp of my range and then turned a burner on to see how hot it gets. As you can see, there are many uses for this IR thermometer. I found the directions to be easy to read and follow. The thermometer is build very well. Sturdy, high-grade plastic housing, strong laser, bright display, and a very nice case. September 14, 2014
Rated 5.0 out of 5.0 by Excellent IR Thermometer Great product for finding leaks in doorways and windows. Easy to use and has lots of features. Comes with a storage sleeve that I wish were a bit sturdier and better designed as I end up putting it in backwards or upside down. September 18, 2014
Rated 5.0 out of 5.0 by does the job I got for "the deal of the day" . This IR thermometer works just like I hope it would. With the IR you can pen point one spot to find the cold air coming out a light socket at 50 with the wall at 73. October 28, 2014
Rated 5.0 out of 5.0 by Excellent product, very versitile The unit was very easy to use and is quite accurate. The remote probe is very handy. October 28, 2014
Rated 2.0 out of 5.0 by Not sure of this no way to calibrate - always reads high by 6 to 11 degrees ice shows 40 degrees case does not fit October 14, 2014
  • 2015-09-03T16:30:10.029-05:00
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